Crystallization point measuring instrument with nitrogen protection device

Abstract

The utility model belongs to the field of chemical analysis instruments, and discloses a crystallization point measuring instrument with a nitrogen protection device. Comprising a sample chamber and a nitrogen control chamber which are arranged in a sealing cover, nitrogen flow is accurately controlled through a nitrogen flow controller in the nitrogen control chamber, and nitrogen consumption is reduced; a nitrogen distributor in the nitrogen control chamber ensures uniform distribution of nitrogen, and the protection effect is improved; the sealing cover is simple and effective in design, easy to mount and dismount, and convenient to clean and maintain.

Description

Technical Field

[0001] This utility model belongs to the field of chemical analysis instruments, specifically relating to a crystallization point measuring instrument with a nitrogen protection device. Background Technology

[0002] Crystallization point determination is an important technique in chemical analysis used to determine the purity of substances. During the determination, the sample needs to be cooled in an oxygen-free environment to prevent oxidation. Traditional crystallization point determination instruments typically lack effective nitrogen protection, meaning the results may be affected by oxygen in the air, thus impacting the accuracy of the determination. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a crystallization point measuring instrument with a nitrogen protection device, thereby solving the problem that existing crystallization point measuring instruments lack effective nitrogen protection.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution: a crystallization point measuring instrument with a nitrogen protection device, comprising a sample chamber and a nitrogen control chamber located within a sealed cover, wherein a nitrogen inlet is provided on the side of the sealed cover of the nitrogen control chamber and the nitrogen inlet is connected to a nitrogen source, and an electrically connected nitrogen distributor and a nitrogen flow controller are provided in the nitrogen control chamber; a sample chamber door is provided at the front of the sealed cover of the sample chamber, a stirring device is provided at the bottom of the sample chamber, a test tube rack is provided inside the sample chamber, test tubes are provided on the test tube rack, and test tubes are provided with test tube caps, and an operating glove is provided on the sample chamber door that extends into the sample chamber, and a connecting gas pipe is provided between the nitrogen distributor and the sample chamber.

[0005] Furthermore, a nitrogen flow meter is installed on the front sealing cover of the nitrogen control chamber, and the nitrogen flow meter is electrically connected to the nitrogen flow controller.

[0006] Furthermore, the sample chamber is surrounded by a nitrogen outlet plate with multiple nitrogen outlet holes.

[0007] In a further preferred embodiment of this invention, the nitrogen outlet plate is a hollow plate, and a gas pipe connection hole is provided on the side of the nitrogen outlet plate for connecting a gas pipe.

[0008] This utility model claims a crystallization point measuring instrument with a nitrogen protection device. A nitrogen source is connected to a nitrogen flow controller via a nitrogen inlet, and the flow controller is then connected to a nitrogen distributor. The nitrogen distributor is connected to surrounding nitrogen outlet plates via connecting pipes, allowing nitrogen to be evenly released into the sample chamber enclosed by the outlet plates. A sealing cover covers the sample chamber, forming a sealed space to prevent outside air from entering.

[0009] The advantages of this utility model compared with the prior art are:

[0010] 1. Nitrogen flow rate is precisely controlled by a nitrogen flow controller to reduce nitrogen consumption.

[0011] 2. The nitrogen distributor ensures uniform nitrogen distribution, improving the protective effect.

[0012] 3. The sealing cover is designed to be simple and effective, easy to install and remove, and easy to clean and maintain. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the crystallization point measuring instrument with nitrogen protection device according to this utility model;

[0015] Figure 2 This is a schematic diagram of the connection between the sample chamber and the nitrogen control chamber in the crystallization point measuring instrument with nitrogen protection device of this utility model;

[0016] Figure 3 This is a schematic diagram of the nitrogen outlet plate structure in the crystallization point measuring instrument with nitrogen protection device of this utility model.

[0017] In the diagram: 1. Nitrogen source; 2. Sealing cover; 3. Nitrogen inlet; 4. Nitrogen distributor; 5. Nitrogen flow controller; 6. Nitrogen flow meter; 7. Sample chamber door; 8. Stirring device; 9. Operating gloves; 10. Nitrogen outlet plate; 11. Sample chamber; 12. Test tube rack; 13. Test tube cap; 14. Test tube; 15. Connecting gas pipe; 16. Nitrogen outlet; 17. Gas pipe connection hole. Detailed Implementation

[0018] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially.

[0019] Example 1

[0020] like Figure 1 As shown, the nitrogen protection device of the crystallization point tester of the present invention includes a nitrogen source 1, a sealing cover 2, a nitrogen distributor 4, a nitrogen flow controller 5, a nitrogen flow meter 6, operating gloves 9, and a nitrogen outlet plate 10. The nitrogen source 1 is connected to the nitrogen flow controller 5 through a nitrogen inlet 3, and the nitrogen flow controller 5 is then connected to the nitrogen distributor 4. The nitrogen distributor 4 is connected to the nitrogen outlet plate 10 around the sample chamber 11 of the crystallization point tester, which can uniformly release nitrogen into the sample chamber 11. The sample chamber 11 is inside the sealing cover 2, forming a sealed space to prevent outside air from entering.

[0021] When in use, turn on the nitrogen source 1, adjust the nitrogen flow rate through the nitrogen flow controller 5, and finally release nitrogen into the sample chamber 11 through the nitrogen distributor 4 and the nitrogen outlet plate 10. After 3-5 minutes, when the nitrogen fills the sample chamber 11, open the sample chamber door 7, put in the sample, close the sample chamber door 7, and start the crystallization point determination operation through the operating gloves 9.

[0022] The nitrogen protection device of the crystallization point tester of the present invention is not only suitable for crystallization point determination in the laboratory, but can also be applied to other chemical analysis processes that require nitrogen protection.

[0023] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model.

Claims

1. A crystallization point measuring instrument with a nitrogen protection device, characterized in that, The sample chamber (11) and nitrogen control chamber are located inside the sealed cover (2). The nitrogen control chamber has a nitrogen inlet (3) on the side of the sealed cover (2) and is connected to a nitrogen source (1). The nitrogen control chamber is equipped with an electrically connected nitrogen distributor (4) and a nitrogen flow controller (5). The sample chamber (11) has a sample chamber door (7) at the front of the sealed cover (2). The sample chamber (11) has a stirring device (8) at the bottom. The sample chamber (11) has a test tube rack (12) inside and a test tube (14) on the test tube rack (12). The test tube (14) has a test tube cap (13). The sample chamber door (7) is equipped with an operating glove (9) that extends into the sample chamber (11). The nitrogen distributor (4) is connected to the sample chamber (11) by a connecting gas pipe (15).

2. The crystallization point measuring instrument with nitrogen protection device according to claim 1, characterized in that, The nitrogen control chamber is equipped with a nitrogen flow meter (6) on the front sealing cover (2), and the nitrogen flow meter (6) is electrically connected to the nitrogen flow controller (5).

3. The crystallization point measuring instrument with nitrogen protection device according to claim 1, characterized in that, The sample chamber (11) is surrounded by a nitrogen outlet plate (10) with multiple nitrogen outlet holes (16).

4. The crystallization point measuring instrument with nitrogen protection device according to claim 3, characterized in that, The nitrogen outlet plate (10) is a hollow plate, and a gas pipe connection hole (17) is provided on the side of the nitrogen outlet plate (10) for connecting the gas pipe (15).

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